add

app/Http/Api/NotifyUrlController.php

@@ -45,7 +45,7 @@ class NotifyUrlController extends HttpBaseController
                 Log::info('支付宝支付---失败,签名验证失败！');
                 return 'fail';
             }
-        } catch (\Exception $e) {
+        } catch (Exception $e) {
             Log::info('支付宝支付---失败！' . $e->getMessage());
             return 'fail';
         }